mirror of https://gitee.com/openkylin/linux.git
47 lines
1.3 KiB
C
47 lines
1.3 KiB
C
/*
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* arch/xtensa/kernel/platform.c
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*
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* Default platform functions.
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 2005 Tensilica Inc.
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*
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* Chris Zankel <chris@zankel.net>
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*/
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#include <linux/types.h>
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#include <linux/pci.h>
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#include <linux/time.h>
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#include <asm/platform.h>
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#include <asm/timex.h>
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#include <asm/param.h> /* HZ */
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#define _F(r,f,a,b) \
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r __platform_##f a b; \
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r platform_##f a __attribute__((weak, alias("__platform_"#f)))
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/*
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* Default functions that are used if no platform specific function is defined.
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* (Please, refer to include/asm-xtensa/platform.h for more information)
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*/
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_F(void, setup, (char** cmd), { });
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_F(void, init_irq, (void), { });
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_F(void, restart, (void), { while(1); });
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_F(void, halt, (void), { while(1); });
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_F(void, power_off, (void), { while(1); });
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_F(void, idle, (void), { __asm__ __volatile__ ("waiti 0" ::: "memory"); });
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_F(void, heartbeat, (void), { });
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_F(int, pcibios_fixup, (void), { return 0; });
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#ifdef CONFIG_XTENSA_CALIBRATE_CCOUNT
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_F(void, calibrate_ccount, (void),
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{
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pr_err("ERROR: Cannot calibrate cpu frequency! Assuming 10MHz.\n");
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ccount_per_jiffy = 10 * (1000000UL/HZ);
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});
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#endif
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